A horizontal well fracturing filling natural gas hydrate efficiency-enhancing production equipment and method

Abstract

The invention belongs to the field of energy and environment, and provides a horizontal well fracturing filling natural gas hydrate efficiency-enhancing exploitation equipment and method. The equipment includes pressure monitoring system, horizontal well fracturing and filling system, sand control system and automatic control feedback system. It solves the problem of difficult pressure transmission caused by the muddy low permeability characteristics of sediments during the production of natural gas hydrates, which in turn leads to the secondary generation of hydrates and freezing blockages. At the same time, the fracturing filling system is used to effectively increase the pressure penetration range, and through the solidification of the proppant in the fracturing area, the stability of the fracturing area and the gas migration channel is realized, and the hydrate decomposition process is significantly strengthened. During the gas production process, the sand control system is used to effectively prevent the fine sand from clogging the gas gathering port during the fracturing process, and the fracturing system is used to flush the sand control system during the natural gas hydrate production process, which solves the problem of easy blockage of the sand control system. The set of equipment and method promotes safe, efficient and large-scale exploitation of marine natural gas hydrate.

Description

technical field [0001] The invention belongs to the field of energy and environment, and relates to a device and method for exploiting natural gas hydrate resources Background technique [0002] With the rapid development of my country's economy, the demand for energy is becoming more and more prominent, and the dependence on foreign natural gas, oil and other energy sources is also increasing. Due to political and military reasons, the price and transportation volume of the international energy market fluctuate, which has a great impact on my country's economic development. had a huge impact. Therefore, it is imminent to ensure my country's energy supply and energy security. Natural gas hydrate is a kind of clean energy with huge reserves. The resource reserves in the South my country Sea of ​​China reach 80 billion tons of oil equivalent. To realize its safe and efficient development is a major energy strategic demand of our country. Natural gas hydrate is a crystalline c...

AI Technical Summary

Problems solved by technology

Vertical wells are usually used for natural gas hydrate exploitation. The problems of this arrangement are short pressure transmission distance and small decomposition area, which is not suitable for small thickness and wide distribution of natural gas hydrate deposits.

Fracturing technology is a technical means to achieve fragmentation of tight rock formations by means of high-pressure liquids. It has been widely used in shale gas development in recent years. Cannot be used directly in marine gas hydrate reservoirs

In addition, due to the small particle size of marine sediments, particles with a diameter of less than 10 microns can account for more than 40%, causing fine sand to migrate with gas and water production during the hydrate mining process, causing wellhead blockage and terminating the mining process

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